Department of Pomology, University of California, Davis, California 95616.
Plant Physiol. 1969 Apr;44(4):555-61. doi: 10.1104/pp.44.4.555.
In the King cultivar of fig, the first crop is parthenocarpic, develops on previous year's growth, and a series of supernumerary ovules develops within the original ovules. The second crop, formed on current-season's growth, requires fertilization. To determine whether the 2 crops differed in types, and in patterns of concentrations of total ;free' auxins and acidic gibberellins, they were extracted from weekly fruit samples. Timing of the 3 peaks of total auxins and the single peak of gibberellins was identical in the 2 crops. The first auxin peak in both occurred at the end of fruit growth period I (first rapid growth period), the second shortly before the end of period II (period of slow growth), and the rise and fall in concentrations of the third peak accompanied the rise and fall of the fruit growth rate in period III. The end of period II was marked by the single gibberellin peak. Additional peaks before the first sampling dates, of auxins in the first crop, of gibberellins in the second, were indicated by high concentrations in the first samples and subsequent rapid decline. The same 4 individual auxins appeared in both crops. Auxins I and II were highest in concentration in the first total auxin peak of both crops. In the second peak of the first crop, auxins II and III were highest, whereas in that peak of the second crop auxins II and IV were highest. Qualitative differences in gibberellins occurred in the 2 crops. In general, auxin concentrations were higher in the first than the second crop, and gibberellin concentrations higher in the second. High concentrations of gibberellins coincided with low ones of auxins, and vice versa.
在帝王品种的无花果中，第一茬果实是单性结实的，由前一年的生长发育而来，在原胚珠内形成一系列额外的胚珠。第二茬果实，由当年的新梢生长发育而来，需要受精。为了确定这两茬果实是否在类型和总游离生长素和酸性赤霉素的浓度模式上存在差异，从每周的果实样本中提取它们。两茬果实中总生长素的 3 个峰值和赤霉素的单个峰值出现的时间完全一致。第一茬果实的两个生长素峰值均出现在果实生长周期 I 的末期（第一快速生长期），第二个峰值出现在周期 II 末期（生长缓慢期）之前不久，第三个峰值浓度的上升和下降伴随着周期 III 中果实生长率的上升和下降。周期 II 的结束标志着赤霉素的单峰出现。第一茬果实的生长素在第一次采样前有额外的峰值，第二茬果实的赤霉素也有额外的峰值，这表明前几次采样的生长素浓度较高，随后迅速下降。两茬果实中都出现了 4 种个体生长素。在两茬果实的第一个总生长素峰值中，生长素 I 和 II 的浓度最高。在第一茬果实的第二个峰值中，生长素 II 和 III 的浓度最高，而在第二茬果实的第二个峰值中，生长素 II 和 IV 的浓度最高。赤霉素在两茬果实中存在定性差异。一般来说，第一茬果实中的生长素浓度高于第二茬，而第二茬果实中的赤霉素浓度高于第一茬。赤霉素浓度高时，生长素浓度低，反之亦然。
